Minnesota Restricted Journeyman Plumber
Examination Questions and Correct Answers
(Verified Answers) Plus Rationale 2027 Q&A|
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1. What is the primary purpose of a plumbing code?
A. To establish minimum requirements for safe plumbing installations
B. To establish labor union wage rates
C. To regulate electrical wiring
D. To determine property tax assessments
Answer: A. To establish minimum requirements for safe plumbing
installations
Rationale: Plumbing codes establish minimum standards intended to
protect public health, safety, and property. They address matters such
as water supply, drainage, venting, fixtures, materials, and
installation methods.
, 2. Under Minnesota's plumbing licensing framework, a restricted
journeyworker plumber traditionally worked under the direction
of which type of plumber?
A. Building inspector
B. General contractor
C. Restricted master plumber
D. Registered architect
Rationale: A restricted journeyworker plumber was defined as an
individual working under the direction of a restricted master plumber
in communities within the restricted population limitation. The
restricted license was narrower than a regular journeyworker license.
3. The Minnesota Plumbing Code is primarily based on which model
plumbing code?
A. International Mechanical Code
B. National Electrical Code
C. International Residential Code
D. Uniform Plumbing Code
,Rationale: Minnesota's 2020 Plumbing Code incorporates the 2018
edition of the Uniform Plumbing Code, together with Minnesota-
specific amendments.
4. Which Minnesota agency administers plumber licensing?
A. Minnesota Department of Transportation
B. Minnesota Department of Health only
C. Minnesota Department of Labor and Industry
D. Minnesota Department of Commerce
Rationale: The Minnesota Department of Labor and Industry,
commonly abbreviated DLI, administers plumbing licensing and
related requirements.
5. Which system carries potable water from the source to plumbing
fixtures?
A. Sanitary drainage system
B. Vent system
C. Storm drainage system
D. Water distribution system
, Rationale: The water distribution system consists of piping and
components that convey water to fixtures and other approved points
of use.
6. What is the primary function of a trap beneath a plumbing
fixture?
A. Increase water pressure
B. Increase drainage velocity
C. Prevent sewer gases from entering the building
D. Eliminate the need for venting
Rationale: A properly installed trap maintains a water seal that
prevents gases from the drainage system from entering occupied
spaces.
7. Which fitting is commonly used to change the direction of a
drainage pipe?
A. Coupling
B. Union
C. Elbow
D. Adapter
Examination Questions and Correct Answers
(Verified Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of a plumbing code?
A. To establish minimum requirements for safe plumbing installations
B. To establish labor union wage rates
C. To regulate electrical wiring
D. To determine property tax assessments
Answer: A. To establish minimum requirements for safe plumbing
installations
Rationale: Plumbing codes establish minimum standards intended to
protect public health, safety, and property. They address matters such
as water supply, drainage, venting, fixtures, materials, and
installation methods.
, 2. Under Minnesota's plumbing licensing framework, a restricted
journeyworker plumber traditionally worked under the direction
of which type of plumber?
A. Building inspector
B. General contractor
C. Restricted master plumber
D. Registered architect
Rationale: A restricted journeyworker plumber was defined as an
individual working under the direction of a restricted master plumber
in communities within the restricted population limitation. The
restricted license was narrower than a regular journeyworker license.
3. The Minnesota Plumbing Code is primarily based on which model
plumbing code?
A. International Mechanical Code
B. National Electrical Code
C. International Residential Code
D. Uniform Plumbing Code
,Rationale: Minnesota's 2020 Plumbing Code incorporates the 2018
edition of the Uniform Plumbing Code, together with Minnesota-
specific amendments.
4. Which Minnesota agency administers plumber licensing?
A. Minnesota Department of Transportation
B. Minnesota Department of Health only
C. Minnesota Department of Labor and Industry
D. Minnesota Department of Commerce
Rationale: The Minnesota Department of Labor and Industry,
commonly abbreviated DLI, administers plumbing licensing and
related requirements.
5. Which system carries potable water from the source to plumbing
fixtures?
A. Sanitary drainage system
B. Vent system
C. Storm drainage system
D. Water distribution system
, Rationale: The water distribution system consists of piping and
components that convey water to fixtures and other approved points
of use.
6. What is the primary function of a trap beneath a plumbing
fixture?
A. Increase water pressure
B. Increase drainage velocity
C. Prevent sewer gases from entering the building
D. Eliminate the need for venting
Rationale: A properly installed trap maintains a water seal that
prevents gases from the drainage system from entering occupied
spaces.
7. Which fitting is commonly used to change the direction of a
drainage pipe?
A. Coupling
B. Union
C. Elbow
D. Adapter
